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by sanderjd 1022 days ago
`ls` does have a 'parent' in the hierarchy: the system calls used to implement directory listings. If `ls` were deprecated (eg. if GNU decided to deprecate it and GNU/Linux distributions actually decided to go along with that), then you or someone else would need to write a new implementation using the system calls, in order to have a useful system.
1 comments

    man 2 stat 
it's not rocket science.